A new catalog of 9,482 dust-lane spheroidal galaxies reveals that these galaxies are significantly redder and have higher specific star-forming rates than non-dust-lane spheroidal galaxies
Researchers find that a shocked cocoon of a collapsar-driven jet choked in an extended circumstellar medium is the most plausible model to explain a supernova that was associated with a fast X-ray transient.
What at first appeared to be single group of stars with similar origins is now known to be three separate groups of stars that have converged at the same location from very different areas in our galaxy.
GRB 211211A is a long-duration gamma-ray burst without an associated supernova; its cause is still unknown, and now researchers have shown that a white dwarf–neutron star merger is a possible source.
Comet 103P/Hartley 2’s brightness has been in decline since 1991, and researchers have inferred that the comet’s active fraction has decreased by an order of magnitude in that time.
Analysis of metallicity gradients out to a redshift of z = 9 suggests that galaxy growth proceeded “inside out” during cosmic dawn, then shifted to enhanced gas mixing during cosmic noon.